On a theorem of Ritt and related Diophantine problems.
On a theorem of MacCluer
Arithmetical properties of function fields (II). The generalized Schur problem
On the Diophantine equation f(y) - x = 0
Rigidity and real residue class fields
The inverse Galois problem and rational points on moduli spaces.
Schinzel's problem: Imprimitive covers and the monodromy method
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